A Sail And Oar Skiff Built From Common Lumber

April 26, 2026 by 2 Comments

For those first venturing into sailing, it can be overwhelming since the experience is thick with jargon and skills that don’t often show up in life ashore. With endless choices, including monohulls versus catamarans, fiberglass versus wood, fractional versus masthead rigs, and sloops versus ketches, a new sailor risks doing something like single-handing a staysail schooner when they should have started on a Bermuda-rigged dinghy without a spinnaker. Luckily, there are some shortcuts to picking up the hobby, like the venerable Sunfish or Hobie ships. It’s also possible to build a simple sailing vessel completely out of materials from a local hardware store, as [Cumberland Rover] has been demonstrating.

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A drill bit, not apparently rotating, descends toward a block of aluminium and throws up aluminium shavings as it passes through the block.

Freeze Moving Tools With A Stroboscopic Camera

April 26, 2026 by 10 Comments

If you take a video of a spinning wheel, you’ll probably notice that the spokes appear to turn more slowly than the wheel is actually rotating, and sometimes in the wrong direction. This is caused by a near match in the frame rate of the camera and the rate of rotation of the wheel – each time the camera captures a frame, the wheel has rotated a spoke into nearly the same position as in the last frame. If you time the exposures carefully, as [Excessive Overkill] did in his latest video, this effect can seemingly freeze moving objects, such as a fan or saw blade.

Most cameras only allow relatively coarse, fixed adjustments to frame rate, making it difficult to synchronize the shutter to an object’s motion. To get around this, [Excessive Overkill] used an industrial camera (previously used in this aimbot), which has fine frame rate control and external triggering. He connected the external trigger to a laser sensor, which detects a piece of retroreflective tape every time it passes by (for example, on one blade of a fan). When the laser sensor sends a signal, it also triggers a powerful LED flash. The flash is so powerful that dark materials create a hum when exposed to it, as pulses quickly heat the material, but each pulse is also so brief that the flash board doesn’t require any cooling.

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2026 Green Powered Challenge: A Portable Solar Panel, Made Better

April 26, 2026 by 2 Comments

Many of us will have seen the portable solar panels offered on our favourite online purveyors of electronics, but some who have bought them remain unimpressed with their performance.  [t.oster92] had just such an issue, and concluded that since it had great dull-day performance, it wasn’t the panels themselves that were at fault. There followed a teardown and an investigation of the circuitry inside.

The panels fed a small PCB containing a buck converter, with an 8-pin SOIC carrying an untraceable part number. Some detective work revealed it was likely to be a rebadged version of a more common part, which exposed the problem as a converter without the rating to deliver the power it should. The solution, at least in part, was to replace it with a more powerful chip on a module and reap the benefits.

This would be the end of the story, but this is an ongoing project. Next up will be adding MPPT capability to extract the last bit of juice from those panels. That makes this one a story to keep an eye on, because we could all use a decent set of panels.

This hack is part of our 2026 Green Powered Challenge.

2026 Hackaday Greep Powered Challenge

Dyson Vacuums And The Curse Of Cooked Capacitors

April 26, 2026 by 19 Comments

It seems to be becoming a bit of a theme that consumer electronics are dying not due to some critical fault, but due to Cooked Capacitor Syndrome (CCS). Case in point, Dyson handheld vacuums and the capacitors on its driver board. After having his $800 Dyson V15 handheld vacuum die after two and a half years of regular use, [LeftyMaker] found himself elbows-deep in the dusty innards of the vacuum just to replace some capacitors.

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Building An IBM PCjr BIOS From Source Using Original Printed Source Code

April 26, 2026 by 12 Comments

As unloved as IBM’s PCjr was, with only a one-year production run, it’s hard to complain about the documentation available for it. This includes the x86 assembly listing for the BIOS, which [dbalsom] recently used this print version to create an ASM project that can be built into a byte-identical copy of the PCjr BIOS.

In order to build the BIOS image, a ZIP file has been made available that contains the requisite assembler and linker tools, all of which can be run in DOS (or DOSBox) using the provided build.bat file. This creates an executable file, which can then be converted into a BIN file using the provided exe2bin.py Python script, or of course, manually.

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The Arduino UNO, Basically

April 26, 2026 by 18 Comments

If you miss the days when you used Basic on your classic computer or wrote embedded software with a Basic Stamp, then maybe dust off your Arduino UNO or any similar AVR board and try nanoBASIC_UNO from [shachi-lab].

Apparently, the original code was meant for the STM8S, but this port targets the ATmega328P. It is Basic more or less as you remember it. There are enough extensions to deal with GPIO, the analog systems, and so forth. At build time, you can decide if you want 16-bit or 32-bit integers.

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Slicer Settings For “Indestructible” Battle-Bot Worthy PLA Parts

April 25, 2026 by 12 Comments

If you follow [Maker’s Muse] on YouTube, you know he’s as passionate about robot fights these days as he is about the tools he uses to make the robots. Luckily for us, he’s still got fame as a 3D printing YouTuber, as this has given him the platform to share his trade secrets for strong, robot-combat-worthy prints.

He fights robots in a ‘plastic ant-weight’ division, which restricts not only the weight of the robot but also the materials used. Not only must they be primarily plastic, but only certain plastics are allowed: PLA is in, but engineering filaments, Nylon, and TPU are out. Since necessity is the mother of invention, this has led to strong evolutionary pressure to figure out how to print the most impact-resilient PLA parts for armor and spinners.

He’s using the latest OrcaSlicer and shares the profile as a pay-what-you-want 3MF file. It’s all about solidity: a solid part with solidly fused walls and solidly linked layers. It makes sense: if you’re going to be hammering on or with these parts, you don’t want any internal voids that could either collapse or pull open.

The infill density is obviously 100%, and you’ll want a concentric pattern — this makes it look like you’re just printing walls, but it allows you to use another trick. To make sure those walls don’t all align, creating a potential weakness, OrcaSlicer’s “alternate extra wall” will put one extra wall every second layer. The extra wall causes the infill pattern to stagger and lock together.

Also helping lock it together, he’s playing with extrusion widths, with the suggested rule-of-thumb being the line width on the walls be one-half that of the internal fill — and as wide as possible. In his case, with a 0.4 mm nozzle, that means 0.4 mm wide walls and 0.8 mm for the infill. OrcaSlicer 2.3.2 also lets you play with specific flow ratios, allowing you to overextrude only the internals for strength, without overextruding on the walls and potentially ruining dimensional accuracy. He also irons all top surfaces, but admits that that’s mostly about aesthetics. The iron may make those layers a little bit stronger, though, so why not?

Would brick layers make these parts even stronger? That’s very likely; [Maker’s Muse] mentions them in the video but does not use them because they’re not implemented in-slicer, and he wants something accessible to all. On the other hand, this post-processing script seems accessible enough for our crowd.

This video/profile is exclusively about fully-solid parts. When you want strong parts that aren’t fully solid, it looks like the answer is walls.

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